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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 233 (Engine Control System - Trouble Shooting - No Codes) >> Symptom Diagnosis >> Rough, Unstable, Or Incorrect Idle & Stalling >> Engine Mechanical Check

Engine Mechanical Check

WARNING: This page is about a different car, the 2003 Pontiac Vibe. However, it is still accessible from the selected car via links, so may be relevant.
  1. Inspect for the following engine mechanical conditions:
    • Any faulty hydraulic lifter assemblies.
    • Any broken or weak valve springs.
    • A low compression.
    • An incorrect valve timing.
    • Any sticking or leaking valves.
    • An incorrect or worn camshaft.
  2. See DIAGNOSTIC STARTING POINT - ENGINE MECHANICAL in appropriate ENGINES article.